Malicious PDF — malware analysis report

Static analysis result for SHA-256 f78205e4db8b9016…

MALICIOUS

PDF

68.6 KB Created: 2021-03-05 01:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d5c0df6d0255d43ff781c7f8755b484c SHA-1: f3cff1fa21269e60d8a0b5a4a197fa9f97e949b0 SHA-256: f78205e4db8b90160a0a0e67bbd79bf6ea3894c0556356136ebca5d020bb0688
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous external links, including one pointing to 'ponafet.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to contain product information, likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ponafet.ru/strik?utm_term=samsung+55+inch+curved+led+4k+tv+series+7 PDF link annotation
    • https://cdn.sqhk.co/naxaroja/3fgfmig/bike_racing_3d_game_free_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/Hk0ijhd/ludo_star_2017_new_version.pdfIn PDF document text
    • https://cdn.sqhk.co/fokivetezabu/gdjg4jc/6309589305.pdfIn PDF document text
    • https://cdn.sqhk.co/mudifuto/hcTiggc/jevewaba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d5bfbd8-d944-42f4-9df5-60f09bf5f49e/what_are_the_12_steps_of_aa_na.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b62e3a5-4808-441a-9f67-73cb46effa1b/are_stoeger_coach_guns_any_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e152006a-98d8-499d-a1a0-67494f4d3cf0/what_is_sales_example.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/juxupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d2b005-100a-4c04-a417-0ef6563d407f/47017804847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0619c78e-9d55-4728-a4d2-481263b83eb1/66807216315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e1598ba-55d1-46a1-9c79-9079ebf6e3d7/how_to_find_the_surface_area_of_a_square_formula.pdfIn PDF document text
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_26ffdca16f4f46479907552319626837.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/af230792-0a35-4ef6-9809-f2953c5ec80f/fizitiwedataniwomatawuna.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/alexa_app_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a0311d6-6001-4d8f-962e-ec505672d7a9/sims_3_key_generator_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/370c4715-e2e2-4d15-a5c5-4b3482165070/2232023617.pdfIn PDF document text
    • https://8319d365-0190-44ee-b2f3-e76f6fd230eb.filesusr.com/ugd/112488_a8bff02db038446bbd448f4544408f8a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70704fad-52fd-438f-97d7-0d08f3ffea69/pobimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a575a29e-4098-44bc-806c-9a023f565a29/how_to_print_a_lease_agreement.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC6 5872 bytes
SHA-256: 8f5c6dc6cf120b52de1abbfc99f42aa44c0046e5a23f2f638d59ad99e72a4032
font_01_sfnt_off0000e1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AE 10468 bytes
SHA-256: 2c7420246ff2d4fbe7c00bdc4aca741d4b716641855781f00c74391bebe58e87

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